skeletonbow: As such, there are thousands if not tens or hundreds of thousands of people out there who make their Steam profile's public and many utilities generate statistics from this which is useful to gamers such as ourselves, useful to game developers and to Valve, Steam and just about anyone in the gaming industry or who enjoys gaming. No personal information is present, just list of games, wishlist and whatever else one has made public.
There's no reason for some company to create an app with some evil alterior motive to trick people into allowing them to data harvest, because the useful data is already out there.
Edit: Actually
Trilarion's post just below is the TL;DR version of mine :-D
Actually I can see a reason, and that's collection of more disaggregated data. Specifically, data about GOG's user base, and subsets of that all the way down to individuals. Useful data is already out there, but there's much more useful data that you can collect through Connect.
Just off the top of my head, some examples that might be nonsense from a commercial point of view (that's why I'm not running a store :-D), but then again I think that the guys actually in charge of this would come up with really useful applications:
- Most obviously, what kind of games that we don't have in our catalog are our customers buying on Steam?
- How many users are buying games more than once, both on Steam and here? What games? How far apart in time? At what discounts?
- How many people are buying day one releases on Steam? What happens when we bring those games to GOG a few months or a year later? (How many times have you seen in the forum that "nice release but sorry, I just got it last month on Steam"?)
- How many people already own this particular game we're negotiating to add to our catalog? Are those the guys who buy games more than once?
- The ones who don't have it, do they wait for the first Steam sale? Do they wait for the first BIG sale? Can we still sell them the game before Steam? Should we hurry?
- Niche games. Look at that game we thought was too niche to be here. Lots of our users bought it on Steam. (Or the other way round. "See? I told you, no way this bunch of old guys was going to buy that" :-P)
- Also, imagine having access to 2 sets of wishlists instead of one. (Although I think wishlists are not provided by the Steam API, but you know, they have all our steam id's now.)
- And so on...
Go down to the individual level, and maybe you and me could be seeing different games in our recommendations based on whether we have (or not) a game on Steam and we could (or not) buy it again. Or a personalised email from time to time reminding us of a certain game we might be interested in although (or because) we have it on Steam... Or because it's in our Steam wishlist.
Now, I'm not in the tin foil hat crew. First, I don't know if GOG is actually aiming for this kind of information. Second, I don't care if they are. I'm actually ok with it, if it will improve their business and my GOG experience. But I wouldn't go as far as thinking that GOG can't have any interest in data-mining us through Connect.